Arrangement for detecting the angular position of a rotatable component

1. An assembly ( 1 ) for capturing an angular position (φ) of a component ( 2 ) that is rotatable about an axis of rotation ( 100 ), the assembly ( 1 ) comprising:

a magnet ( 10 ) configured to produce a magnetic field ( 20 ); and

a sensor assembly ( 30 ) spaced apart from the magnet ( 10 ) and configured to capture the magnetic field ( 20 ) in a measuring plane ( 200 ) that extends substantially orthogonal to the axis of rotation ( 100 ) and to supply an angle signal ( 48 ) that corresponds to the angular position (φ) of the component ( 2 ) therefrom, wherein the magnet ( 10 ) or the sensor assembly ( 30 ) is arranged to be rotatable about the axis of rotation ( 100 ), the sensor assembly ( 30 ) including:

a first sensor group ( 31 ) arranged in the measuring plane ( 200 ), the first sensor group comprising a first magnetically sensitive element ( 32 ) arranged at a predetermined distance (R) from the axis of rotation ( 100 ), a second magnetically sensitive element ( 33 ) arranged opposite to the first magnetically sensitive element ( 32 ) relative to the axis of rotation ( 100 ), the second magnetically sensitive element being arranged at the predetermined distance from the axis of rotation ( 100 ), and a third magnetically sensitive element ( 34 ) arranged centrally between the first magnetically sensitive element ( 32 ) and the second magnetically sensitive element ( 33 ), wherein the first magnetically sensitive element ( 32 ), the second magnetically sensitive element ( 33 ) and the third magnetically sensitive element ( 34 ) are: (a) each arranged parallel to one another, and (b) each configured to capture the magnetic field ( 20 ) along a first direction ( 202 ),

a second sensor group ( 35 ) arranged in the measuring plane ( 200 ), the second sensor group comprising a fourth magnetically sensitive element ( 36 ) arranged at the predetermined distance (R) from the axis of rotation ( 100 ), a fifth magnetically sensitive element ( 37 ) arranged opposite to the fourth magnetically sensitive element ( 36 ) relative to the axis of rotation ( 100 ), the fifth magnetically sensitive element being arranged at the predetermined distance from the axis of rotation ( 100 ), and a sixth magnetically sensitive element ( 38 ) arranged centrally between the fourth magnetically sensitive element ( 36 ) and the fifth magnetically sensitive element ( 37 ), wherein the fourth magnetically sensitive element ( 36 ), the fifth magnetically sensitive element ( 37 ) and the sixth magnetically sensitive element ( 38 ) are: (a) each arranged parallel to one another, and (b) each configured to capture the magnetic field ( 20 ) along a second direction ( 204 ) that extends at a predetermined angle (α) with respect to the first direction ( 202 ), and

an evaluation unit ( 40 ), which is connected to the magnetically sensitive elements ( 32 , 33 , 34 ) of the first sensor group ( 31 ) and to the magnetically sensitive elements ( 36 , 37 , 38 ) of the second sensor group ( 35 ) and configured to supply the angle signal ( 48 ) corresponding to the angular position (φ) of the component ( 2 ),

wherein the third magnetically sensitive element ( 34 ) and the sixth magnetically sensitive element ( 38 ) are arranged so as to overlap one another in an overlap region, and wherein the axis of rotation ( 100 ) passes through the overlap region,

wherein, in a top down view with respect to the measuring plane ( 200 ), of the first, second, third, fourth, fifth and sixth magnetically sensitive elements, only the third and the sixth magnetically sensitive elements overlap one another.

2. The assembly ( 1 ) as claimed in claim 1 , wherein the evaluation unit ( 40 ) comprises:

a first evaluation element ( 41 ), which is connected to the first magnetically sensitive element ( 32 ) and the third magnetically sensitive element ( 34 ) and configured to produce a first intermediate signal from signals of the first magnetically sensitive element ( 32 ) and of the third magnetically sensitive element ( 34 ),

a second evaluation element ( 42 ), which is connected to the second magnetically sensitive element ( 33 ) and the third magnetically sensitive element ( 34 ) and configured to produce a second intermediate signal from signals of the second magnetically sensitive element ( 33 ) and of the third magnetically sensitive element ( 34 ),

a third evaluation element ( 43 ), which is connected to the fourth magnetically sensitive element ( 36 ) and the sixth magnetically sensitive element ( 38 ) and configured to produce a third intermediate signal from signals of the fourth magnetically sensitive element ( 36 ) and of the sixth magnetically sensitive element ( 38 ), and

a fourth evaluation element ( 44 ), which is connected to the fifth magnetically sensitive element ( 37 ) and the sixth magnetically sensitive element ( 38 ) and configured to produce a fourth intermediate signal from signals of the fifth magnetically sensitive element ( 37 ) and of the sixth magnetically sensitive element ( 38 ).

3. The assembly ( 1 ) as claimed in claim 2 , wherein the evaluation unit ( 40 ) further comprises:

a fifth evaluation element ( 45 ), which is connected to the first evaluation element ( 41 ) and the second evaluation element ( 42 ) and configured to produce a first component signal from the first intermediate signal and the second intermediate signal,

a sixth evaluation element ( 46 ), which is connected to the third evaluation element ( 43 ) and the fourth evaluation element ( 44 ) and configured to produce a second component signal from the third intermediate signal and the fourth intermediate signal, and

a seventh evaluation element ( 47 ), which is connected to the fifth evaluation element ( 45 ) and the sixth evaluation element ( 46 ) and configured to produce the angle signal ( 48 ) corresponding to the angular position (φ) of the component ( 2 ) from the first component signal and the second component signal.

4. The assembly ( 1 ) as claimed in claim 3 , wherein the fifth evaluation element ( 45 ) and/or the sixth evaluation element ( 46 ) comprise an addition former.

5. The assembly ( 1 ) as claimed in claim 4 , wherein the first evaluation element ( 41 ) and/or the second evaluation element ( 42 ) and/or the third evaluation element ( 43 ) and/or the fourth evaluation element ( 44 ) comprise a difference former.

6. The assembly ( 1 ) as claimed in claim 5 , wherein

the first component signal is a cosine-shaped signal with respect to the predetermined angle (α),

the second component signal is a sine-shaped signal with respect to the predetermined angle (α) and

the seventh evaluation element ( 47 ) is configured to produce the angle signal ( 48 ) corresponding to the angular position (φ) of the component ( 2 ) by an arctangent function from the first component signal and the second component signal.

7. The assembly ( 1 ) as claimed in claim 1 , wherein the magnet ( 10 ) comprises a number of poles, the number of poles of the magnet ( 10 ) being divisible by two as an integer.

8. The assembly ( 1 ) as claimed in claim 7 , wherein the magnet ( 10 ) is fastened to the rotatable component ( 2 ) and the sensor assembly ( 30 ) has a stationary arrangement relative to the magnet ( 10 ).

9. The assembly ( 1 ) as claimed claim 7 , wherein the magnet ( 10 ) has a stationary arrangement relative to the sensor assembly ( 30 ) and the sensor assembly ( 30 ) is fastened to the rotatable component ( 2 ).

10. The assembly ( 1 ) as claimed in in claim 1 , wherein the measuring plane ( 200 ) extends substantially orthogonal to the axis of rotation ( 100 ).